Problem: Polycarpus has postcards and photos hung in a row on the wall. He decided to put them away to the closet and hang on the wall a famous painter's picture. Polycarpus does it like that: he goes from the left to the right and removes the objects consecutively. As Polycarpus doesn't want any mix-ups to happen, he will not carry in his hands objects of two different types. In other words, Polycarpus can't carry both postcards and photos simultaneously. Sometimes he goes to the closet and puts the objects there, thus leaving his hands free. Polycarpus must put all the postcards and photos to the closet. He cannot skip objects. What minimum number of times he should visit the closet if he cannot carry more than 5 items?

Input

The only line of the input data contains a non-empty string consisting of letters "С" and "P" whose length does not exceed 100 characters. If the i-th character in the string is the letter "С", that means that the i-th object (the numbering goes from the left to the right) on Polycarpus' wall is a postcard. And if the i-th character is the letter "P", than the i-th object on the wall is a photo.

Output

Print the only number — the minimum number of times Polycarpus has to visit the closet.

Examples

Input

CPCPCPC


Output

7


Input

CCCCCCPPPPPP


Output

4


Input

CCCCCCPPCPPPPPPPPPP


Output

6


Input

CCCCCCCCCC


Output

2

Note

In the first sample Polycarpus needs to take one item to the closet 7 times.

In the second sample Polycarpus can first take 3 postcards to the closet; then 3 more. He can take the 6 photos that are left in the similar way, going to the closet twice.

In the third sample Polycarpus can visit the closet twice, both times carrying 3 postcards. Then he can take there 2 photos at once, then one postcard and finally, he can carry the last 10 photos if he visits the closet twice.

In the fourth sample Polycarpus can visit the closet twice and take there all 10 postcards (5 items during each go).

Solution (in JAVA):

Solution:
/* ==================================================
 * NYU Programming Team Week 7 Problem 1
 * Shikuan Huang
 * http://acm.hust.edu.cn/vjudge/contest/view.action?cid=61139#overview
 * ==================================================
 */

import java.util.Scanner;

public class Main {
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		String sequence = input.next();				// Sequence of postcards and photos
		int holding = 0;							// How many things is he holding?
		int trips = 0;								// How many trips does he need?
		
		// Go through each character
		char previous = sequence.charAt(0);
		holding = 1;
		for (int i = 1; i < sequence.length(); i++)
		{
			// If current item is the same as previous, hold the current item
			if (sequence.charAt(i) == previous)
				holding++;
			// Else current item is different from previous, make a trip, then hold current item
			else
			{
				trips++;
				holding = 1;
				previous = sequence.charAt(i);
			}
			
			// If hand is full, make a trip, reset previous item
			if (holding == 5)
			{
				holding = 0;
				trips++;
				
				if (i != sequence.length() - 1)
					previous = sequence.charAt(i + 1);
			}
		}
		
		// If he is still holding on to things, make a trip
		if (holding != 0)
			trips++;
		
		System.out.println(trips);
		
		input.close();
	}
}